Home / 129,250.50-178,365.69-72,662.28

Finding the Fourth Proportional to 129,250.50, 178,365.69 and 72,662.28

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Solution

The fourth proportional to 129,250.50, 178,365.69 and 72,662.28 is: 100,273.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,250.50 : 178,365.69 = 72,662.28 : x
  2. Step 2: Convert to fraction form
    129,250.50/178,365.69 = 72,662.28/x
  3. Step 3: Cross multiply
    129,250.50x = 178,365.69 × 72,662.28
  4. Step 4: Simplify right side
    129,250.50x = 12,960,457,709.17
  5. Step 5: Solve for x
    x = 12,960,457,709.17/129,250.50
  6. Step 6: Final answer
    x = 100,273.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.